Well-drill.



F. G. BAKER.

WELL DRILL.

APPLICATION FILED FEB. 25, 1913.

Patented Aug 26, 1913.

MWKWDN WN YQ NN UNITED STATES PATEN T OFFICE.

FRANK c. BAKER, or MARICOPA, oAL''roRNI-A.

WELL-DRILL.

To all whom t may concern Be it known that I, FRANK C. BAKER, a citizen of the United States, residing at Maricopa, in the county of Kern and State of California, have invented certain new and useful Improvements in Well-Drills, of which the following is a specification.

This invention relates to well drilling tools, and more particularly 'a rotary drilling tool.

It is the object of the present invention to provide novel and improved means for operating the drill, and also to provide a casing to receive the drillings while the tool is in operation. These objects are attained by a combination and arrangement of parts to be hereinafter described and claimed, and in order that the invention may be better understood, reference is had to the accompanying drawing` in which- Figure 1 is a central longitudinal section of the tool. Fig. 2 is ar enlarged sectional detail of the drill actuating device. Fig. 3 is an enlarged section of the lower end of the tool. Fig. 4 is a cross section on the line 4-4 of Fig. 2. Fig. 5 is a cross section on the line 5-5 of Fig. 3.

Referring specifically to the drawing, 10 denotes an elongated tubular casing fitted at one end with an ordinary coupling piece 11 for connection to the rod or stem whereby the tool is lowered into the drill hole and operated. Into this casing,-from the other end thereof, extends a stem 12 having a double spiral groove or screw thread, and having its outer end fitted with a coupling socket 13 into which screws a coupling piece 14 on the upper end of a drill shank l5, whereby said stem and drill shank are connected so that they may rotate together. The inner end of the stem 12 carries a collar 16 to limit its outward movement from the casing 10. In the casing 10, near its lower end, is secured, by rivets or stud-bolts, a collar 17 having ratchet teeth 18 at its lower end. The stem 12 extends loosely through this collar. Below the collar is a sleeve 19 having ratchet teeth 20 in its end which are adjacent to the teeth 18, and adapted to intermesh therewith, as will be presently described. The sleeve 19 is loose in the casing 10 and the stem 12 passes therethrough. On the inside of the sleeve are two lugs 21 fitting in the spiral grooves of the stem 12. The sleeve is rpushed toward the collar 17 by a coiled spring 22 located between the Specification of Letters Patent.

Application led February 25, 191.3.

Patentierung. 26,1913. serial No. 750,547.

tail or other point 24 at its lower end, which is made to screw on said end of the shank. The shank 15 `carries an inclosing tubular casing 25 below the lower end of which, on the outside thereof, the point `24 works.

The upper end of the casing 25 has a fixed internal collar or abut-ment 26 through which the shank 15 loosely passes. The upper end of the shank 15 h as a fixed collar or abutment 27 which is below the collar 26. Above the collar 26 the shank 15 has a shoulder 2 8.` The collar 26 is between the collar 27 and the shoulder 28,` and the casing 25 and shank15 are thus held against longitudinal separation. The bottom of the casing 25 is closed by a valve comprising two inwardly opening hinged flaps 29, the free edges of which meet and have 'opposite recesses 30 forming an aperture through which the lower end of the shank 15 passes.

In the lower end of the casing 25 is a side opening 31 forming an outlet for the contents of the casing. This outlet is provided with a closure comprising a sleeve 32 which is rotatably mounted o-n the casing over the outlet, and has an opening 33 adapted to be brought into registry therewith when the casing is to be emptied. Upon adjusting the sleeve so that its imperforate portion covers the outlet, the latter will be closed.

The drill shank 15 is rotated to operate the point 24 by slipping the casing 10` up and down on the stem 12, which is done by lifting and dropping the parts which are connected to the upper end of the said casing. The casing is alternately lifted and dropped, it being allowed to drop by its own weight and the weight of the parts connected to it above. When the casing descends the stem 12 is rotated by the engagement of the lugs 21 of the sleeve 19 with the spiral groove, rotationof the sleeve being prevented by the engagement of its teeth 21 with the teeth 18 of the collar 17. l/Vhen the casing ascends the sleeve rotates, its teeth slipping the teeth of the collar and consequently no rotary movement is imparted to the stem 12.

The drillings enter the casing 25 through the lower end thereof by forcing the valve iaps 29 open, and when the casing is filled,

it can be emptied by adjusting the sleeve 32 to uncover the outlet 3l as hereinbefore described, the tool, of course, being withdrawn from the drill hole for this purpose.

I claim:

l. in a well drilling tool, an elongated tubular casing having coupling means at its upper end, a drill shank having a spirally grooved stem extending into the casing, a collar fixed in the casing and having ratchet teeth at one end, through which collar the stem loosely passes, a Sleeve loose in the casing and encircling the stem, said sleeve having internal lugs seating in the spiral groove, and said sleeve also having ratchet teeth at one end meshing with the ratchet teeth of the collar, and resilient means engaging the sleeve for holding the ratchet teeth of the same and the collar in mesh.

2. In a well drilling tool, an elongated tubular casing having coupling means at its upper end, a drill shank having a spirally grooved stem extending into the casing, a collar ixed in the casing and having ratchet teeth at one end, through which collar the stem loosely passes, a sleeve loose in the casing and encircling the stem, said sleeve having internal lugs seating in the spiral groove, and said sleeve also having ratchet teeth at one end meshing with the ratchet teeth of the collar, resilient means engaging the sleeve for holding the ratchet teeth of the same and the collar in mesh, and an abutment on the inner end of the stem to limit the outward movement thereof.

3. In a well drilling tool, a drill bit having a shank, a tubular casing inclosing said drill shank, the drill bit being below the bottom of the casing, and said casing having an outlet, a closure for the outlet, and an inwardly opening valve on the bottom of the casing.

4. In a well drilling tool, a drill bit having a shank, a tubular casing inclosing said drill shank, the drill bit being below the bottom of the casing, and said casing having an outlet, a closure for the outlet, and inwardly opening valve flaps on the bottom of the casing, the meeting edges oit said valve flaps having opposite recesses forming an opening through which the drill shank passes. v

4In testimony whereof I aiiX my signature in presence of two witnesses.

FRANK C. BAKER.

"Witnesses:

MAXWELL LONGFELDER, HOWARD H. BELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, '.D. C. 

